"Wagon Wheel" is a shoe tapper of a country tune that Bob Dylan co-wrote and Old Crow Medicine Show mainstreamed. The song has inspired covers from Darius Rucker in America, Nathan Carter in Ireland and, most recently but least known, Chris Watt at Chargers Park.

The third-round pick stood before teammates and gave a rendition.

So rock me mama like a wagon wheel, Rock me mama any way you feel, H-e-e-e-y mama rock me ...

"It's all in good fun," Watt said.

Watt seems to have a good grasp on rookie life. Its next phase returns him to the field. On Monday afternoon, the Chargers guard is expected to participate in team drills for the first time since an undisclosed, apparent head injury on Aug. 5. Even that he took in stride, keeping productive on the sideline while missing last Thursday's exhibition opener.

Watt has acclimated well in San Diego.

On the field, he takes center reps before practice. During, he works predominantly at first-team right guard.

Outside of the traditional work, he embraces what he calls rookie "rites of passage."

Watt is assigned to carry veteran guard Chad Rinehart's equipment off the field in camp. He doesn't complain. Across the NFL, a common practice is for rookies to sing before the group at least once during an offseason meeting. When it was Watt's turn, he said he "gave some energy" when singing "Wagon Wheel."

"I think people appreciated it," Watt said. "They cheered me on. The biggest thing when you're singing is you have to get into it. If you have a little bit of a tune and you get into it, you're going to get claps. If you're not really too sure of yourself going up there, you'll get booed off, quickly."

Before being injured, Watt was slated to start last week's exhibition game.

Instead, the 23-year-old assisted offensive line coaches Joe D'Alessandris and Andrew Dees with some new technology. Teams this preseason are working with a tablet on the sideline for the first time. The equipment is a modern alternative to those black-and-white still photographs coaches and players are seen on television reviewing between series.

Tablet images are in color.

They can swipe through them. They can zoom into them. D'Alessandris would tell Watt which ones to save as a "favorite" that could be referenced later.

"A few updates might be needed to make it a little easier," Watt said. "Every series that went, (the tablet) broke it up, but when you put (plays) into favorites, it didn't break them up by series. I think it'd be easier if it did."